Sylvania Indoor 40 Watt Light Bulb. 40W. 120V. Life 1000 hours. Standard base. 1 T10 bulbs. If you are not satisfied with this product's performance, return the UPC code along with your name and address to the address on this package. We will replace your bulb free of charge. Made in China. 1-800-LIGHTBULB (1-800-544-4828). www.sylvania.com (US). 01 (800) 716 7007. www.osram.com.mx (Mexico). Sylvania is a registered trademark of Osram Sylvania Inc.